AP Exhaust 641404 Catalytic Converter with Integrated Exhaust Manifold - Front Right

AP Exhaust Catalytic Converter with Integrated Exhaust Manifold Overview

The AP Exhaust catalytic converter with integrated exhaust manifold (part number 641404) is designed for direct-fit replacement on select Lexus models. Engineered with durable stainless steel and a ceramic substrate, this component ensures reliable emissions control and optimal exhaust flow for Lexus GS300, GS350, IS250, IS350, and RC350 vehicles.

• Constructed from corrosion-resistant stainless steel body
• Includes inlet and outlet gaskets for proper sealing
• Features a 6 bolt welded flange inlet and 2 bolt welded flange outlet
• Equipped with one O2 sensor port for accurate emissions monitoring
• Overall length of 28.5 inches for precise fitment
• Ceramic substrate material for effective catalytic conversion
• Federal / EPA direct-fit manifold type for compliance and ease of installation

Durable Design and Technical Specifications

This AP Exhaust catalytic converter with integrated exhaust manifold is built with a stainless steel body to resist rust and withstand high temperatures. The ceramic substrate inside facilitates efficient conversion of harmful exhaust gases into less harmful emissions. The inlet side features a 6 bolt welded flange, while the outlet side uses a 2 bolt welded flange, both designed to match factory specifications. The inclusion of one O2 sensor port allows for proper sensor installation, maintaining engine performance and emissions compliance. With an overall length of 28.5 inches, this part is engineered for a direct-fit replacement on compatible Lexus models.

Compatible Lexus Models and Applications

• Compatible with Lexus GS300 and GS350 models
• Fits Lexus IS250 and IS350 vehicles
• Suitable for Lexus RC350 applications
• Designed for federal and EPA emissions standards compliance

Common Issues Addressed by This Catalytic Converter

• Replacement for clogged or damaged catalytic converters causing poor engine performance
• Fixes check engine light triggered by faulty O2 sensor readings
• Resolves exhaust leaks due to manifold or gasket failure
• Helps restore proper emissions control to pass state inspections
• Eliminates rattling noises from broken or degraded catalytic substrates

Installation Notes and Tips

Ensure the vehicle is cooled down before beginning installation. This part includes inlet and outlet gaskets but does not include inlet hardware. Proper torque specifications should be followed for the 6 bolt inlet flange and 2 bolt outlet flange to prevent exhaust leaks. Verify O2 sensor port alignment and sensor condition during installation. Professional installation is recommended to maintain emissions compliance and vehicle performance.

Quality Assurance and Warranty Information

AP Exhaust catalytic converters are manufactured to meet federal and EPA standards for emissions control. The stainless steel construction and ceramic substrate provide durability and long service life. Warranty coverage details should be confirmed with the product documentation or manufacturer, as it may vary by region and application.